Songle SRD Series 3V 10A DC Relay

The Songle SRD series relays are electromagnetic devices that find extensive usage in a multitude of electrical and electronic applications.

General Characteristics

• Brand: Songle
• Series: SRD
• Nominal Current: Generally 10A
• Contact Configuration: Available in SPDT (Single Pole Double Throw) or SPST (Single Pole Single Throw)
• Coil Voltages: Offered in a range of voltages, including 3V, 5V, 6V, 9V, 12V, 24V, 48V DC
• Contact Voltage: 250V AC or 30V DC
• Size: Compact design, typically suitable for PCB mounting

Technical Details

• Coil Resistance: Depends on voltage (e.g., approximately 400Ω for 12V DC)
• Operate Time: Maximum of 10ms
• Release Time: Maximum of 5ms
• Dielectric Strength: 500VAC (coil to contact), 1000VAC (between contacts)
• Mechanical Life: 10 million operations
• Electrical Life: 100,000 operations (at nominal load)

Applications

• Industrial Control Systems: Machine and motor control
• Home Automation: Lighting, heating, and cooling systems
• Security Systems: Alarm systems, security doors
• Automotive Applications: Electric windows, headlights
• Electronic Projects: Frequently used with Arduino and other microcontroller projects

Advantages

• High Reliability: Due to its electromechanical design, it is durable and reliable.
• Wide Application Range: Suitable for both AC and DC loads.
• Easy Installation: Can be conveniently mounted on PCBs.

Disadvantages

• Mechanical Wear: Mechanical components may degrade over time, potentially shortening the relay's lifespan.
• Size: May be larger compared to solid-state relays in certain applications.

Example Product: SRD-03VDC-SL-C

• Coil Voltage: 5V DC
• Coil Resistance: 70Ω
• Nominal Current: 10A
• Contact Configuration: SPDT
• Operate and Release Time: 10ms and 5ms